Error: kubernetes redis connection refused

What's Causing This Error

The "kubernetes redis connection refused" error typically occurs when an application or service deployed on a Kubernetes cluster is attempting to establish a connection with a Redis instance, but it fails due to one or more reasons. The common causes for this error include: misconfigured network settings in the Kubernetes cluster, incorrect service endpoint configurations which prevent clients from reaching the Redis server, improper configuration of the Redis instance itself (e.g., wrong password or binding address), or resource constraints in the cluster that cause the server to be unresponsive or crash.

Solution - Here's How To Resolve It

To resolve the "kubernetes redis connection refused" error, you need to carry out the following steps:

1. Verify the network settings: Check if the Kubernetes pod network and service network are configured correctly, ensuring there are no conflicts or overlapping IP addresses.
2. Examine the service endpoint configuration: Ensure that the Redis service is exposed via a ClusterIP or LoadBalancer with the correct port number and targetPort matching the Redis container.
3. Validate Redis instance configuration: Inspect the Redis configuration file and logs to confirm it is listening on the intended address (0.0.0.0 by default) and port. Also, check whether authentication (if enabled) is properly set up with a valid password.
4. Resource utilization: Monitor the resource usage of the Redis pod, including CPU, memory, and storage, to ensure it has sufficient resources to run smoothly. Adjust resource allocation as needed by updating the pod's resource limits and requests.
5. Review the application code: Finally, double-check your application code for any issues related to Redis connectivity, such as incorrect hostnames, ports, or authentication information.